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XSharpLoadLibrary Function (RT)

Year Function (RT)

IsMethodUsual Function

Check whether a particular method can be sent to an object inside a USUAL.

Namespace: XSharp.RT
Assembly: XSharp.RT (in XSharp.RT.dll) Version: 2.19

Syntax

Copy

 FUNCTION IsMethodUsual(
	uObject AS USUAL,
	symMethod AS STRING
) AS LOGIC

public static bool IsMethodUsual(
	Usual uObject,
	string symMethod
)

Request Example View Source

Parameters

uObject: Type: Usual
A USUAL containing an object.
symMethod: Type: String
The method name, specified without parentheses.

Return Value

Type: Logic
TRUE if the specified method is defined for the class of the specified object; otherwise, FALSE.

Remarks

IsMethodUsual() is used to determine whether the polymorphic value uObject is an object that has a method symMethod. IsMethodUsual() is the same as the following: UsualType(uObject) = OBJECT .AND. IsMethod(uObject, symMethod). Thus it should be used instead of IsMethod() in situations where it is not known whether a variable is an object.

Examples

This example uses IsMethodUsual() to check whether a particular method can be sent.
If there is an object and a particular method for it exists, it issues the method; otherwise, it calls a function:

Copy

1IF IsMethodUsual(uO, #GoTop)
2    uO:GoTop()
3ELSE
4    MyGoTop()    
5ENDIF

Reference

Functions, Globals and Defines

XSharp.RT Namespace

CheckInstanceOf(Object, String)

IsMethodClass(String, String)